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    What kind of gear do I need for a battery driven wooden toy car? (roughly 1:32 scale)

    My friends and I made a wooden toy car for a project. For now it's hand driven, but we want to add a battery and DC motor in order to drive it with a button. We're not sure what material or size of gear we should choose for the "link" between the DC motor and the axle that rotates the car...

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